pipelines

/P AY1 P L AY0 N Z/
noun
  1. 1

    A conduit made of pipes used to convey water, gas or petroleum etc.

    โ€œAn oil pipeline has been opened from the Caspian Sea.โ€

  2. 2

    A channel (either physical or logical) by which information is transmitted sequentially (that is, the first information in is the first information out).

    โ€œ3D images are rendered using the graphics pipeline.โ€

  3. 3

    A system or process through which something is conducted.

    โ€œA new version of the software is in the pipeline, but has not been rolled out.โ€

  4. 4

    The inside of a wave that a surfer is riding, when the wave has started closing over it.

Source: https://en.wiktionary.org/wiki/pipeline, https://en.wiktionary.org/wiki/pipelines